We use water for drinking, irrigation, industry, transport and for the production of hydroelectricity. Rooftop rainwater harvesting system a model based approach. The great challenge for the coming decades will be the task of scarcity of water. It can also reduce the need of water in drought affected areas and other famine areas. What is rainwater harvesting, its importance and various. Generally speaking, it is a process used for collecting and storing rainwater for human use. This technology can be adopted as a household project or in hospitals, schools, housing. The common components of a rainwater harvesting system involved in these stages are illustrated here. These stored waters are used for various purposes such as gardening, irrigation etc. Water is an important natural resource and is the very basis of our life. This has been included in indian railway works manual 2000 vide correction slip no. This paper presents the best way of utilizing the stored water. Rainwater harvesting is a technology used for collecting and storing rainwater from rooftops, the land surface or rock catchments using simple techniques such as jars and pots as well as more complex techniques such as underground check dams.
Modern rainwater harvesting techniques steering towards. Rainwater harvesting systems are simple which can be adopted by individuals 8. This simple method can put forward a solution which will be workable in areas where there is sufficient rain but the groundwater supply is not sufficient on the one hand and on the other surface water resource is insufficient. Rainwater harvesting systems store and release rainfall for future use. Rainwater can be harvested from the following surfaces. Rainwater harvesting advantages disadvantages aloaqua. The rainwater runs off into sea as the ground area available for percolation for recharging is meager insignificant. Borewell recharge sankalpa rural development society. Rainwater harvesting systems can be as simple as a rain barrel for garden irrigation at the end of a downspout, or as complex as a domestic potable system or a multiple enduse system at a large corporate campus. Roof top rainwater harvesting method rrh involves diverting and recharging or storing rainwater that falls on the roof of a housebuilding.
Rooftop rain water harvesting systems are easy to construct, operate and maintain 9. Presented by rajesh kumar gupta suraj kumar vishwakarma 2. Rainwater harvesting for domestic use journey to forever. Rainwater harvesting systems intercept, divert, store and release rainfall for future use. Rainwater harvesting reduces consumers utility bills. Rainwater harvesting helps utilities reduce the summer demand peak and delay expansion of existing water treatment plants. There are two major techniques of rainwater harvesting. Rainwater harvesting seminar and ppt with pdf report. Rainwater harvesting is a simple easy and costeffective technique that can be.
Running the largest rooftop rainwater harvesting projects gansu province in china and semiarid north east brazil. Our earth is covered with 75% of water and 25% of land but water scarcity is a global issue because the large extent of water is not used for the domestic purpose, irrigation purpose and one of the solutions for such problem is the rainwater harvesting in the areas of regular rainfall, the perfect alternative to overcome the water. Rainwater harvesting is the simple process or technology used to conserve rainwater by collecting, storing, conveying and purifying of rainwater that runs off from rooftops, parks, roads, open grounds, etc. Assessment of best practises and experience in water. Rainwater harvesting is a simple lowcost technique that requires. Surface runoff harvesting in this method, rainwater flows away as surface runoff and can be stored for future use. Rooftop rainwater harvesting method is used in the present study.
The main objective of rooftop rain water harvesting is to make water available for future use. Rainwater can be collected from rivers or roofs, and in many places, the water collected is redirected to a deep pit well, shaft, or borehole. Methods of rooftop water harvesting storage for direct use rain water collected from the roof is diverted to storage tank. In this method, the rainwater is directly stored, at where it falls. For drinking water purposes in rural areas, the most common technique is smallscale rooftop rainwater harvesting. Rainwater harvesting is a strategy of collection and storage space of rainwater into natural reservoirs or tanks, or the seepage of surface water into subsoil water channels. Apart from resolving your waterscarcity issue, our borewell recharge technique also ensures the storage of naturally filtered rainwater in natural waterreservoirs i. The subject has assumed lot of significance in the present scenario.
Rooftop rainwater harvesting is a method of collecting rain water where it falls and in which rain water is captured from the roof catchments of domestic houses or commercial buildings and stored in the tanks. Roof top rain water harvesting central ground water. Each drainpipe should have mesh filter at mouth and first flush device before connecting to. Tapping the rainwater from where it falls techniques of rainwater harvesting involve catch the rainwater from localized catchment surfaces such as roof of a house, plain and sloping ground surfaces etc. Recharge the rainwater in a scientifically planned way by construction of rain roof top water harvesting structures to augment the groundwater. Rainwater harvesting process, advantages and disadvantages. In this method, rainwater is collected from the rooftops of the homes and buildings.
To make the process of rainwater harvesting easier, it is advisable to build some sort of collection system. Making the switch to an eco friendly rainwater harvesting system is neither complicated or time consuming and will result in a wide range of benefits for your home or. Capturing and storing rain water for use is particularly important in dryland, hilly, urban and coastal areas. Water class 6 science rainwater harvesting and methods. In hilly terrains, rain water harvesting is preferred 10. Pdf rooftop rainwater harvesting system a model based. Manual on rainwater harvesting has been developed as part of an initiative by the karnataka state council for science and technology to promote large scale rainwater harvesting in urban areas. Rainwater harvesting rwh is a simple lowcost technique that requires minimum specific expertise or knowledge and offers many benefits. Rainwater harvesting is the storing of rainwater during the monsoon season for the purpose of using it during periods of water scarcity. Rainwater that falls on a rooftop is collected and conveyed into an above or below ground storage tank where. Rain water harvesting can be effectively implemented in our office and residential complexes for conservation of rain water. Surface water can be stored by diverting the flow of small creeks and streams into reservoirs on the surface or underground. Roof top acts as a collecting surface, from where water is.
It is easy process to collect rainwater and diverted into ponds, vessels or. Rainwater that falls on a rooftop or other impervious surface is collected and conveyed into an above or belowground storage tank also referred to as a cistern or rain tank, where it can be used. Rainwater harvesting is a technique where the rainwaters are collected into natural reservoirs, tanks or made to infiltrate the surface waters via subsurface aquifers. In this study, water balance model wbm and rippl method rm are used to investigate the optimization of rooftop rainwater harvesting in antalya province of turkey. Rainwater harvesting is an effective and eco friendly method of reducing water usage in your dwelling, which will lead to reduced water bills. The rooftop rain water harvesting is less expensive 7. Various methods of using roof top rainwater harvesting are illustrated in this section. But before delving into the various components of an rwh system, it is, first of all important, to understand how useful rainwater harvesting is. The collection of rainwater can be done in various methods depending on a few factors. Plus, individuals, group houses, or even corporate enterprises can efficiently use this method on a daily basis. The tank will need to have some way to retrieve water such as a tap. In saline or coastal areas, rain water provides good quality water and. The dependency on water for future development has become a critical constraint for development. Us rainwater can be used directly in water scarce period by construction of sump and collect the roof top rainwater through filter media.
Rain barrels it is the easiest and affordable method of rainwater harvesting, especially at home. The rainwater harvesting techniques have been in existence since decades now. Rainwater harvesting is a type of harvest in which they collect the rain drops and store it for the future use. Rainwater harvesting or the collection of rainwater in a proper way, can be a permanent solution to the problem of water crisis in different parts of the world. Rainwater harvesting methods top rainwater harvesting. Hence the rooftop rainwater harvesting method is best suitable for conservation of rainwater and recharging the groundwater aquifer. It also strives to guide the process of planning, designing and.
It is one of the purest form of water found on earth, because it is collected after it. Perhaps one of the most interesting aspects of rainwater harvesting is learning about the methods of capture, storage, and use of this natural resource. A rainwater harvesting system comprises components of various stages transporting rainwater through pipes or drains, filtration, and storage in tanks for reuse or recharge. In towns and cities, rainwater flows as surface runoff and this could be stored for the future use by implementing correct methods. These are some of the significant advantages of harvesting rainwater. The objective of the spreadsheet is to put rainwater harvesting on a level playing field with other stormwater bmps so that its use can become more widespread. So the overall objective and reason to utilize concepts and techniques of rainwater harvesting is to optimise the use of the available rainfall on any given location. Rainwater harvesting is the collection and storage of rainwater for reuse onsite, rather than allowing it to run off. This is one practice that can help store and save water for future consumption.